Diagnosis Procedure

DIAGNOSIS PROCEDURE

Step	Action	YES	NO
1	CHECK OVERALL FUNCTION Turn ignition switch ON. Pinch fuel feed hose with two fingers. Courtesy of SUZUKI OF AMERICA CORP. Fuel pressure pulsation should be felt on the fuel feed hose for 1 second after ignition switch is turned ON. OK or NG	INSPECTION END	GO TO 2.
2	CHECK FUEL PUMP POWER SUPPLY CIRCUIT-I Turn ignition switch OFF. Disconnect ECM harness connector. Turn ignition switch ON. Check voltage between ECM terminal 113 and ground with SDT or tester. Courtesy of SUZUKI OF AMERICA CORP. Voltage: Battery voltage OK or NG	GO TO 5.	GO TO 3.
3	CHECK FUEL PUMP POWER SUPPLY CIRCUIT-II Check voltage between IPDM E/R terminal 46 and ground with SDT or tester. Voltage: Battery voltage OK or NG	GO TO 4.	GO TO 12.
4	DETECT MALFUNCTIONING PART Check harness for open or short between IPDM E/R and ECM	Repair harness or connectors.
5	CHECK FUEL PUMP POWER SUPPLY CIRCUIT-III Turn ignition switch OFF. Reconnect all harness connectors disconnected. Disconnect "fuel level sensor unit and fuel pump" harness connector. Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP. 4. Turn ignition switch ON. 5. Check voltage between "fuel level sensor unit and fuel pump" terminal 1 and ground with SDT or tester. Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP. Voltage: Battery voltage should exist for 1 second after ignition switch is turned ON. 6. Also check harness for short to ground and short to power. OK or NG	GO TO 9.	GO TO 6.
6	CHECK 15A FUSE Turn ignition switch OFF. Disconnect 15A fuse. Check 15 A fuse (No. 48). OK or NG	GO TO 7.	Replace 15A fuse.
7	CHECK FUEL PUMP POWER SUPPLY CURCUIT-IV Disconnect IPDM E/R harness connector E119. Check harness continuity between "fuel level sensor unit and fuel pump" terminal 1 and IPDM E/R terminal 13. Refer to WIRING DIAGRAM . Continuity should exist. Also check harness for short to ground and short to power. OK or NG	GO TO 12.	GO TO 8.
8	DETECT MALFUNCTIONING PART Check the following. Harness connectors C1, E41 Harness for open or short between "fuel level sensor unit and fuel pump" and IPDM E/R	Repair open circuit or short to ground or short to power in harness or connectors.
9	CHECK FUEL PUMP GROUND CIRCUIT FOR OPEN AND SHORT Check harness continuity between "fuel level sensor unit and fuel pump" terminal 3 and ground. Refer to WIRING DIAGRAM . Continuity should exist. Also check harness for short to ground. OK or NG	GO TO 11.	GO TO 10.
10	DETECT MALFUNCTIONING PART Check the following. Harness connectors C1, E41 Harness for open or short between "fuel level sensor unit and fuel pump" and ground	Repair open circuit or short to power in harness or connectors.
11	CHECK FUEL PUMP Refer to [FUEL PUMP CIRCUIT CHECK ]. OK or NG	GO TO 12.	Replace fuel pump.
12	CHECK INTERMITTENT INCIDENT Refer to [SERVICE INFORMATION FOR ELECTRICAL INCIDENT: INTERMITTENT INCIDENT ] OK or NG	Replace IPDM E/R.	Repair or replace harness or connectors.